A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror

Lütkemeier S, Rückert U (2010)
IEEE Transactions on Circuits and Systems II: Express Briefs 57(9): 721-724.

Journal Article | Published | English

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Abstract
In this brief, we propose a novel level shifter circuit that is capable of converting subthreshold to above-threshold signal levels. In contrast to other existing implementations, it does not require a static current flow and can therefore offer considerable static power savings. The circuit has been optimized and simulated in a 90-nm process technology. It operates correctly across process corners for supply voltages from 100 mV to 1 V on the low-voltage side. At the target design voltage of 200 mV, the level shifter has a propagation delay of 18.4 ns and a static power dissipation of 6.6 nW. For a 1-MHz input signal, the total energy per transition is 93.9 fJ. Simulation results are compared to an existing subthreshold to above-threshold level shifter implementation from the paper of Chen et al.
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Lütkemeier S, Rückert U. A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror. IEEE Transactions on Circuits and Systems II: Express Briefs. 2010;57(9):721-724.
Lütkemeier, S., & Rückert, U. (2010). A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror. IEEE Transactions on Circuits and Systems II: Express Briefs, 57(9), 721-724.
Lütkemeier, S., and Rückert, U. (2010). A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror. IEEE Transactions on Circuits and Systems II: Express Briefs 57, 721-724.
Lütkemeier, S., & Rückert, U., 2010. A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror. IEEE Transactions on Circuits and Systems II: Express Briefs, 57(9), p 721-724.
S. Lütkemeier and U. Rückert, “A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror”, IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 57, 2010, pp. 721-724.
Lütkemeier, S., Rückert, U.: A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror. IEEE Transactions on Circuits and Systems II: Express Briefs. 57, 721-724 (2010).
Lütkemeier, Sven, and Rückert, Ulrich. “A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror”. IEEE Transactions on Circuits and Systems II: Express Briefs 57.9 (2010): 721-724.
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